psoralea. LEGUMIXO^E. 141 



L. Torreyi Greene 1. c. 14fi. Hosackia Torreyi Gray. Minutely pubes- 

 cent : stems rather slender, numerous, from a stout perennial root, 1-2 

 feet high, mostly simple: stipules triangular, a line or more long; leaflets 

 5-9, obovate to narrowly oblaneeolate or linear, densely pubescent be- 

 neath, mostly obtnse, 6-12 lines long: peduncles exceeding the leaves; 

 bracts usually trifoliolate : umbels 5-7-flowered : teeth of the pubescent 

 calyx subulate, about as long as the short cam panulate tube ; petals 6 lines 

 long, the upper one bright yellow, the lateral ones and very obtuse keel 

 white or reddish: pods linear. 1-2 inches long, with an acuminate hooked 

 beak. In springs and ditches, southwestern Oregon to California. 



Tribe 5. Galegex. Bronn. (partly) f. & O. VIA, 292. Erect 

 herbs, shrubs, or trees with usually unequally pinnate, seldom 

 stipellate lea res and axillary or terminal, racemose or spi- 

 cate inflorescence. Corolla papilionaceous, or otherwise irregu- 

 lar. Stamens diadelphous or sometimes monadelphous. Pod* 

 continuous, rarely with transverse cellular partitions between the 

 seeds, but never separating into joints, l-eelled. several-seeded, de- 

 hiscent, or 1-2-seeded and indehiscenl. Radicl incurred or in- 

 flexed. 



9 PSOEALEA Royen L. Gen. ed. 2, 358. 



Our species perennial herbs, the herbage punctate with dark 

 glandular dots with digitately or pinnately 3-o-foliolate leaves 

 with entire leaflets and tree stipules, and white or purple flowers 

 in axillary pedunculate spikes or racemes, mostly with mem- 

 branaceous deciduous bracts. Calyx campanulate, persistent, 5- 

 cleft, its teeth nearly equal, or the lower one longest, the two 

 upper ones often connate. Petals free from the stamens : keel 

 broad and obtuse above, united with the wings. Stamens usually 

 diadelphous, the upper one sometimes united with the others at 

 the base ; anthers uniform, often only 5 perfect. Pods ovate, 

 about as long as the calyx, 1-seeded, indehiscent, thick, often 

 wrinkled. 



* Leaves digitately 3-5-foliolate, rarely 7-foliolate. 



P. Lanceolata Pursh. Fl. 475. Aromatic-glandular throughout : stems 

 slender. 12-30 inches high, erect or assurgent, branched, glabrous or with 

 a few scattered hairs: stipules linear-lanceolate to setaceous, 3-HS lines 

 long: petioles 1-2 inches long ; leaves trifoliolate ; leaflets 1-2 inches long, 

 linear lanceolate to obovate, acute or obtuse, mucronate, glabrous or with 

 a tew hairs: peduncles longer than the leaves ; inflorescence capitate, 

 small; bracts minute; flowers nearly white; calyx minutely hairy, the 

 lobes nearly equal, obtuse: pods globose, 3 lines long, light with conspicu- 

 ous large raised brown glands, nearly glabrous, beak small and erect: 

 seeds globose, brown. On sandy plains, Oregon and AYashington to Iowa 

 and Arizona. 



P. Purshii Vail Bull . Torr. Club, xxi, 94. Glandular throughout; 

 stems assurgent G-20 inches high or more, from a long slender rootstock, 

 glabrous or somewhat hirsute at base ; scales ovate, scarious: leaves 3- 

 foliorte; stipules lanceolate, :}-4 lines long; leaflets 1-2 inches long, obo- 

 vate cuneate or elliptical, or the uppermost nearly lanceolate and often 

 much narrower, varying greatly in size and shape, refuse or mucronulate, 

 glandular, glabrous or with a few scattered white hairs: peduncles vary- 

 ing in length, rarely longer than the leaves: flowers scattered in slender 

 spikes or crowded in nearly capitate heads; bracts minute ; lobes of the 



